| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a thermoplastic resin foam sheet which has bubbles with an extremely fine diameter and excellent in uniformity, and which is also excellent in mechanical strength.SOLUTION: A method for producing a thermoplastic resin foam has: a mixing step to produce a resin composition having a sea-island structure by mixing a thermoplastic resin (A) and a thermoplastic resin (B) incompatible with each other; an immersing step to produce a foamable resin composition by immersing a foaming agent in the resin composition; a curing step to cure the foamable resin composition in a predetermined condition; a foaming step to produce a foaming resin composition by foaming the foamable resin composition in a predetermined condition; and a cooling step to cool the foaming resin composition in a predetermined condition. |
